Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Paenibacillaceae, Genus Paenibacillus, Paenibacillus siamensis
Khianngam, Tanasupawat, Lee, Lee and Akaracharanya, 2009.
Gram-positive, motile rods, 0.5-0.8 x 2-11 µm. Produce ellipsoidal, central /
subterminal spore in swollen sporangium.
Colonies are white, circular or oval, flat, undulate, opaque, 0.05-2.5 mm in diameter
on C agar (5 g peptone Difco, 1 g yeast extract Difco, 4 g K2HPO4, 1 g MgSO4 * 7H2O,
0.2 g KCl,0.02 g FeSO4 * 7H2O and 1000 ml distilled water and adjusted to pH 7.0).
Aerobic and anaerobic growth. Growth temperature 15-50 ºC. No growth at 10 or 55
ºC. Can grow in 3 and 5% NaCl. Grow at pH 7-9 but not at pH 5-6. No growth on TSI
The type strain was isolated from mountain soil in Thailand.
- Khianngam S., Tanasupawat S., Lee J.-S., Lee K.C. and Akaracharanya A., 2009. Paenibacillus siamensis sp. nov., Paenibacillus
septentrionalis sp. nov. and Paenibacillus montaniterrae sp. nov., xylanase-producing bacteria from Thai soils. IJSEM 59,130-134.
Positive results for xylanase, catalase, hydrolysis of esculin, hydrolysis of starch, hydrolysis of Tween 80, hydrolysis of urea, oxidase,
Voges-Proskauer, acid production from: aesculin, amygdalin, L-arabinose, cellobiose, galactose, beta-gentiobiose, glycogen,
methyl-alpha-D-glucoside, lactose, maltose, D-mannitol, melibiose, raffinose, rhamnose, ribose, salicin, starch, sucrose, trehalose,
turanose, D-xylose & methyl-beta-D-xyloside.
Negative results for arginine dihydrolase, citrate utilization, dihydroxyacetone production, hydrolysis of casein, DN-ase, hydrolysis of
gelatin, methyl red, nitrate reduction, indole production, degradation of tyrosine, acid production from: N-acetylglucosamine, adonitol,
D-arabinose, arabitol, arbutin, dulcitol, erythritol, fructose, D- or L-fucose, gluconate, D-glucose, glycerol, inositol, inulin, 2- or
5-ketogluconate, lyxose, mannose, methyl-alpha-D-mannoside, melezitose, sorbitol, sorbose, tagatose, xylitol & L-xylose.
(c) Costin Stoica